4 credit card machines down and no service! FNB, how can we help you?

We are a corporate using 4 credit card machines from FNB. We have logged a service call with FNB Merchant Service yesterday because all our machines were experiencing difficulties in processing transactions. At 12:00 lunch time we were promised that a technician is going to visit us within 2-4 hours. We called yesterday after 5 hours to querry why no technician was coming, to be only told that they will escalate the matter by email. Today nearly 24 hours later still no call and no whats app although all numbers are available to them. Ref *** / Maybe somebody must wake up here and check why this service is not running as it should. 4 credit card machines justify immediate attention! FNB - How can we help you...